A good PCB layout for the TPS40140RHHR involves keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing the length of the input and output traces. TI provides a recommended PCB layout in the datasheet and application notes.
The selection of input and output capacitors depends on the specific application requirements. TI recommends using low-ESR capacitors with a minimum capacitance of 10uF for the input and output. The capacitor selection guide in the datasheet can help in choosing the right capacitors.
The TPS40140RHHR is rated for operation from -40°C to 125°C. However, the device can be operated at a higher temperature range with derating. Consult the datasheet for more information on thermal derating.
To ensure stability, follow the recommended PCB layout, use the recommended input and output capacitors, and ensure that the input voltage is within the specified range. Additionally, the datasheet provides guidance on how to calculate the stability of the device.
The TPS40140RHHR is capable of delivering up to 4A of output current. However, the maximum output current may be limited by the thermal performance of the device and the PCB. Consult the datasheet for more information on thermal performance and output current capability.
TPS40140RHHR datasheet
by Texas Instruments
